Arc-lamp.



NO. 873,414. PATENTED DEC. 10, 1907. W. E. DANIELS. ARC LAMP.

APPLICATION FILED JULY 21,1906.

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No. 873,41 x PATENTBD 1130.10, 1907. w. B. DANIELS.

ARC LAMP.

APPLICATION FILED JULY 21, 1906.

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WALTER E. DANIELS, OF CHICAGO, ILLINOIS.

ARC-LAMP;

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed July 21. 1906. Serial No. 327.184:-

To all whom it may concern:

Be it known that I, WALTER E. DANIELS, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Arc-Lamps, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to electric arc lamps, and particularly to those used for the ornamental lighting of streets and'parkways. I

The invention contemplates a lamp adapted to be hung from the end of a pendent support or to be supported upon the capital of an ornamental column or bracket and having a globe completely inclosing its entire structure, there y providing a housing or hood for the mechanism of the lam in addition to performing the usual functions of a lam globe.

The 0 jects of the invention are to rovide a lamp of the type described, w ich shall be completely protected from the corrosive action of the atmosphere and from the entrance of insects to its mechanism, by a housing which may be readily opened or removed when the lam is to be trimmed and which will effect a uniform and pleasing distribution of light without shadows.

Further objects of the invention are to provide an arc lamp which may be used to advantage in architectural and landscape decoration, to reduce the cost of construction and maintenance of such lamps, and-to I increase their efliciency.

- The invention is eXem lified in the structure to be hereinafter escribed and illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of an arc lamp showing a housing and the support there for, constructed" according to the invention,

in central vertical section; Fig. 2. is a side elevation of the lamp and support therefor, illustrated in Fig. 1, a portion of the housing being removed and the position of the lamp for trimming being illustrated by dotted lilies; Fig. 3 is a side elevation of an arc lamp showing a modified form of housing and support in central vertical section Fig. 4 is a side elevation of the support and lamp housing illustrated in Fig. 3; Fig. 5 is a side elevation of an arc lam showing in central vertical section a still urther modification in the form of support and housing for the the type commonly termed the incandescent are or inclosed arc and .having a small globe inclosing the carbon pencils between which the arc is struck. For the lamp mechanism there is provided a frame, generally designated 10 and including a tubular casing 11 I for a carbon pencil 12.

At the lower end of the tubular casing 11 -is a horizontally disposed flange 13 from which there is sup orted, by means of rods or posts 14, a sha e-holder 15 of insulating material. To this holder is secured, by means of a stirrup 16, the small globe 17 for inclosing the carbon pencils of the-lamp, the lower pencil 19 being carried by a bracketarm 18 secured to the shade-holder 15 within the globe. At the upper end of the tubular casing 11 is a housing 20 for parts of the mechanism of the lamp. That part of the lamp mechanism, as shown, not within the housing 20, includes a plunger 21 which controls an operating lever 22, ivotally attached to the side of the tubular casing 11 and having near its farther end a pitman 23 which carries clutch mechanism 24 for engaging the upper or movable carbon encil 12. In carrying out the invention the ame of the lamp is preferably reinforced by a strap 25, which, in the form of lamp illustrated, passes entirely across the upper side of the Housing 20 and has its ends secured to the shade-holder 15 at 26 and 27.

The lamp will commonly be mounted at the to of an ornamental column 28, preferably of tubular form, to accommodate within its interior the wires 29 and 30 through which current will be led to the lamp. At the u er-end of the column 28 there will usual y be provided some form of capital 31, and upon this there is secured, by means of bolts, a disk 32 of insulating material, such as porcelain. To the top of the disk-32' there is applied, in the referred form of construction,

a pair of stan ards 33, 34, each having near its upper end a bearing 35 to receive a trunnion, as 36, 37, formed on a part of the lam frame, as the strap 25. One of the stan ards, as 34, is extended beyond the bearing 35, as indicated at 38, and a clip 39, movably surrounding the strap 25 of the lamp frame,

is adapted to engage the extended end of the standard to lock the lamp in a vertical position.

A- housing is provided for the lamp, and preferably takes the form of a globe 40 of transparent or translucent material, such as the wellknown opalescent glass. As shown this globe is horizontally divided into upper and lower hemispherical sections 41, 42, respectively, and the lower section of the globe is apertured, as indicated at 43, to receive 4 the end of the sup orting column, a flanged edge 44 being pre erably formed about the aperture to form a seat for the globe upon t etop of the capital 31 of the column. On the to of the lamp frame there is provided a threa ed stud or bolt 45, and in the upper globe section 41 is anaperture 46 through which this bolt may pass when the globe is in place. A flanged bushing 47 is provided for the opening 46 to prevent the entrance of moisture and insects, and a keeper 48, shown as taking the form of an ornamental threaded nut, is applied to the bolt 45 outside of the globe and bears upon its upper section to hold it to its seat upon the rim of the lower section.

In order that a close fit may be provided between the two globe sections, the rims of both are faced with a layer 49 of yielding material, such as felt, preferably permanently secured in place by a suitable cement. The electric wires 29, 30, may be led up through the body of the globe in any convenient manner, both being preferably sufficiently loose to permit the lamp to be turned on its trunnions 36, 37, and they are i connected to the lamp mechanism by means of binding screws 50, 51, provided for that pur ose.

en in use, current will be supplied to the lamp through the wires 29 and 30, and an arc will be struck and maintained between the adjacent ends of the carbon pencils 12 and 19 in the usual manner, except that there will be so little access of air to the interior of the housing 40 and through it to the interior of the globe 17, that the life of the carbon pencils will be greatly prolonged. When it is desired to replace the carbon pen cils 12 and 19 or to obtain access to the lamp mechanism for any other purpose, the upper globe section 41 of the housing 40 may be bodily removed by first removing the nut 48 from the projecting end of the bolt 45. Then, by disengaging the clip 39 from the standard 34, the lamp may be rotated on its trunnions 36, 37, for example, to the horizontal position indicated by dotted lines in Fig. 2, in order that any of its parts may be conveniently accessible.

If desired the lamp frame 10 may be at tached to a pendent support, as the overhanging pole 52, Figs. 3 and 4. A bushing 53 of insulating material will then be preferably provided to iit the apertured end of the support and will itself be apertured, as indicated at 54, 55, to accommodate the electric wires 29 and 30 of the lamp, and. will have a central threaded aperture 56 into which the stud 45 formed upon the top of the lamp frame may be screwed. A globe 57, preferably of spherical form and horizontally divided into sections 58, 59, is provided as a housing for the lam when supported in thls way. The upper g lobe section 58 is apertured, as indicated at 60, to receive the bushing 53, and the two globe sections are united by a pair of globe rings 61, 62, as shown hinged together at 63 and connected by a clasp 64 opposite the hinge. Each of the rings is secured to the flanged rim 65 of one of the globe sections by the usual set-screws 66 (Fig. 7).

In order that the entire weight of the globe may not bear upon the walls of the upper globe section, the upper globe ring 61 is preferably united by straps 67 to a metal washer or bushing 68 flanged into the globe aperture 60. An additional support for the lamp may then be provided by a pair of rods 69, (Fig. 7), carried by the upper globe ring 61 and crossing the interior of the globe, each having brackets 71. (Fig. 3) secured to a detail of the lamp frame 10, as the shade holder 15, by a screw 12. In this form of construction access may be had to the lamp mechanism for the purpose of renewing the carbon pencils 12 and 19 by releasing the clasp 64, thus permitting the lower globe section 59 of the housing to swing down to the position indicated by dotted lines in Fig. 3.

It may be desirable in some instances to employ the hinged globe-connecting rings 61, 62, and the style of globe 57 illustrated in Figs. 3, 4 and 7, in connection with a vertical support 73 (.Figs. 5 and 6) from below the lamp. The supportingrods 69 and 70 crossing the interior of the globe and secured to the lamp frame 10 through the brackets 71 and shade-holder 15, are then preferably employed in place of the form of lower support illustrated in Figs. 1 and 2, in order that the lamp may be raised bodily with the upper globe section 58 to the dotted line position of Fig. 5 for trimming. An opening 74 is then also provided in the lower globe sec tion for receiving a detail of the supporting column 73 and the electric wires 29 and 30, and is preferably fitted with a bushing 75 of insulating material which rests upon the top of the post.

By means of the invention there is provided a lamp having its mechanism completely inelosed and protected from the corrosive action of the atmosphere by a housing which may be of glass and therefore entirely unaffected by such conditions, while the appearanee of the lamp is such that it may be employed in a variety of circumstances for decorative purposes. I do not, however,

claim these features of the invention broadly herein, for the reason that such claims are reserved for my copending application for patent on are lamps, Serial No. 350,202, filed December 31st, 1906.

I claim as my invention 1. In combination With an electric arc lamp having a frame and With a support therefor having a capital, a trunnion formed on the lamp frame, a standard rising from the capital of the support and having a journal for the trunnion, and a globe inclosing the lamp and having an opening for receiving the capital of the support.

2. In combination with an electric arclamp having a frame and with a support therefor having a capital, a trunnion formed on the lamp frame, a standard rising from the capital of the support and having a journal for the trunnion, a bolt formed on the top of the lamp frame, ahorizontally divided sectional globe inclosing the lamp, the lower section thereof having an opening fitting the capital of the support and the upper section thereof having an opening for receiving the bolt of the lamp frame, and a keeper engaging the bolt and bearing on the upper globe section. L 3. In combination with an electric arc lamp having a frame and a vertical supfport therefor, a bolt formed on tlie top 0 the lamp frame, a horizontally divided sectional globe inclosing the lamp, the lower section thereof having an opening to receive the end of the support and the upper section thereof having an opening to receive the bolt, and akeeper engaging the bolt and bearing on the upper globe section.

4. In combination, an electric arc lamp, a horizontally divided sectional globe forming a housing for the lamp, and a sup ort for the lamp Within the globe having a 'nged connection With the lamp adjacent the plane of division of the globe. I

5. In combination, an electric arc lamp having a frame, a bolt formed on the top of the frame, a horizontally divided sectional globe forming a housing for the lamp, the upper section thereof having an opening to recelve the bolt, a support for the lamp Within the globe having a hinged connection with the lamp frame adjacent the plane of division of the globe, and a keeper engaging the bolt and bearing on the upper globe-section.

I WALTER E. DANIELS.

Witnesses:

CHARLES B. GILLSON, E. M. KLATCHER. 

